Preparation method of ultrahigh molecular weight polyethylene fiber

An ultra-high molecular weight, polyethylene fiber technology, applied in the direction of single-component polyolefin man-made filament, spinning solution preparation, wet spinning, etc. structure and other problems, to achieve the effect of reducing the breaking strength and reducing the dosage

Active Publication Date: 2010-07-07
CHANGSHU SUPERFIBER
7 Cites 15 Cited by

AI-Extracted Technical Summary

Problems solved by technology

The disadvantage of this method is that the structure of the jelly fiber will be destroyed if the super-...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Method used

[0012] Referring to Fig. 1 and Fig. 2, the main difference between the inventive method and the method of the prior art is that the present invention has carried out one-stage drafting and secondary drafting successively before extraction. Wherein, the multiple of primary drafting can be 2 to 8 times, and the multiple of secondary drafting can be 1.1 to 3 time...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Abstract

The invention relates to a method of preparing ultrahigh molecular weight polyethylene fiber through gel spinning method. The method comprises the following steps: (1) preparing gel protofilament of ultrahigh molecular weight polyethylene; and (2) processing the gel protofilament through extracting, drying and hot drawing to obtain the ultrahigh molecular weight polyethylene fiber. The method is characterized in that the method also comprises the step of pre-drawing the gel protofilament obtained in the step (1) before the step (2), wherein the pre-drawing time is 2.2-24 times and the total hot drawing time in the step (2) is 30-45 times. The method of the invention can be used to obtain ultrahigh molecular weight polyethylene fiber product with low size and high breaking strength and the production cost is low.

Application Domain

Technology Topic

Ultra-high-molecular-weight polyethyleneFiber +3

Image

  • Preparation method of ultrahigh molecular weight polyethylene fiber
  • Preparation method of ultrahigh molecular weight polyethylene fiber

Examples

  • Experimental program(1)

Example Embodiment

[0012] See figure 1 with figure 2 The main difference between the method of the present invention and the method of the prior art is that the present invention performs a primary drafting and a secondary drafting in sequence before extraction. Among them, the multiple of the primary drafting can be 2 to 8 times, and the multiple of the secondary drafting can be 1.1 to 3 times, and the thermal drawing multiple of the present invention is lower than the prior art, and the range is 30 to 45. Therefore, the fiber obtained in the present invention has a lower fineness while still maintaining a higher breaking strength. The present invention will be further described in detail below in conjunction with specific embodiments.
[0013] A preparation method of ultra-high molecular weight polyethylene fiber includes the following steps:
[0014] (1). Preparation of frozen collagen filaments of ultra-high molecular weight polyethylene: UHMWPE (viscosity average molecular weight 4.5 million), solvent white oil 70 # , Respectively inject into the unwrapping kettle according to the mass ratio of 8:100, shear for 25 minutes under the protection of nitrogen, and the shear rate is 3000 seconds -1 , The emulsion mixture is obtained, and then the mixture is fed into the twin-screw extruder, the diameter of the screw extruder is 95mm, the ratio of length to diameter is 64, the rotation speed is 160rpm, and the extrudates output by the screw extruder are successively After passing through the filter, box and metering pump, it is sprayed from the spinneret hole (diameter 0.7mm, hole number 100~200f) of the spinneret, and then enters the water bath containing 1wt% surfactant at 15℃~40℃ to solidify. The frozen collagen filament;
[0015] (2) Pre-drawing the frozen collagen filament obtained in step (1), specifically, first-stage drafting with a multiple of 3 to 8 times, and then a second-stage drafting with a multiple of 1.1-2.5 times.
[0016] (3) Use the hydrocarbon cleaning agent as the extractant to extract the frozen collagen filaments that have passed through step (2), then dry, and heat-stretch 35 times to obtain a total denier of 50 to 200D, and a single filament size of 1 to 2D ultra-high molecular weight polyethylene fiber. After testing, the fiber breaking strength is more than 40cn/dtex, the modulus is more than 1200g/d, and the fiber denier unevenness is less than 6%.
[0017] The present invention has been described in detail above, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it, but it cannot limit the scope of protection of the present invention. Anything done in accordance with the spirit of the present invention, etc. The effect changes or modifications should be covered by the protection scope of the present invention.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Boiling point125.0 ~ 155.0°C
Monofilament denier1.0 ~ 2.0D
Breaking strength>= 40.0cN/dtex
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Similar technology patents

Method for synthesizing mesoporous mordenite

ActiveCN102190316AReduce dosageThe synthesis process is simpleMordenite aluminosilicate zeoliteChemistryPolyvinyl butyral
Owner:CHINA PETROLEUM & CHEM CORP +1

Classification and recommendation of technical efficacy words

Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products